20.500.12556/DKUM-97133 Modelling and simulation of hot direct extrusion process for optimal product characteristics: single and multi-response optimization approach The study of eccentricity minimization in cylindrical products helps to reduce the mechanical vibrations and wear of related mechanical parts such as bearings, columns and gears which positively affects in maintenance costs savings and increasing production quality reliability. The main purpose of this paper is to investigate the effect of the eccentricity between the billet material and the die parts on the quality of the final product in the direct extrusion process. The input parameters to produce a cylindrical product shape are optimized in MINITAB based on Taguchi method and ANOVA. The selected material of the billet is the aluminium alloy AA2024, and the die material is Steel H13. The inputs parameters are the temperature, the die angle, the ram speed, and the presumed eccentricity. The finite element model of the process is simulated in DFORM-3D for providing the extrusion information such as the pressure, the effective stress and strain, the final product eccentricity, and the roundness error. The study is carried out on two cases of the presumed eccentricity in addition to a case of zero eccentricity. The single and multi-response optimizations are executed to obtain the optimum parameters for the minimum product eccentricity and roundness error. metal forming hot direct extrusion eccentricity optimization roundness simulation modelling single response multi-response DEFORM-3D MINITAB simulacije optimizacija modeliranje true false true Fakulteta za strojništvo, Inštitut za proizvodno strojništvo Angleški jezik Slovenski jezik https://apem-journal.org/index.html Content from this work may be used under the terms of the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation, and DOI. Članek v reviji 2026-02-19 12:04:07 2026-02-19 12:04:08 2026-03-20 06:56:08 0000-00-00 00:00:00 2022 0 0 str. 33-44 no. 1 Vol. 17 Mar. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2022-01-11 2022-02-28 2022-04-29 658.5 268996867 10.14743/apem2022.1.419 1854-6250 APEM17-1_033-044.pdf APEM17-1_033-044.pdf 1 AAA48977B270786195444798348243BF 93eafbe2fabcaaa73d970077ae2b996b49dd1ed09f4466464f386c12744ae07e fa0ae278-0d82-11f1-a5b8-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203520 Fakulteta za strojništvo Advances in production engineering & management 0 0 0